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balu736 [363]
3 years ago
5

Which expression is equivalent to 15x + 3?

Mathematics
1 answer:
adelina 88 [10]3 years ago
6 0

Answer:

the answer is 15x+3=3(5x+1)

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Someone please helppp
mel-nik [20]

Answer:

k = 5/6

Step-by-step explanation:

First, we can make this have the form of a quadratic function, or ax²+bx+c=0. To do this, we can first subtract 10x from both sides to get

(2k+1)x²-8x=-6

Next, we can add 6 to both sides, resulting in

(2k+1)x²-8x+6 = 0

For a quadratic function of form ax²+bx+c=0, we can see that a=2k+1, b=-8, and c=6. We can then apply the quadratic equation, or

x= (-b ± √(b²-4ac))/(2a) to get our roots to be

x= (8 ± √(64-4(6)(2k+1)))/(2*(2k+1))

=  (8 ± √(64-(48k+24)))/(4k+2)

=  (8 ± √(40-48k))/(4k+2)

For the roots to be equal, we must have the two roots equal to each other. We can write this as

(8 + √(40-48k))/(4k+2) = (8 - √(40-48k))/(4k+2)

multiply both sides by (4k+2) to remove the denominator

8+√(40-48k) = 8 - √(40-48k)

subtract 8 from both sides to isolate the square roots

√(40-48k) = - √(40-48k)

The only number that is equal to its negative self (and is real) is 0. Therefore, √(40-48k) = - √(40-48k) = 0, so we have

√(40-48k) = 0

square both sides to remove the square root

40-48k = 0

add 48k to both sides to isolate the k and its coefficient

40 = 48k

divide both sides by 48 to isolate k

k = 40/48 = 5/6

7 0
3 years ago
A basketball court has a width of m3n7 and a length of 8m6n3p. Which of the following is the area of the basketball court?
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A = L x W
A = 8m^6n^3p x <span>m^3n^7
A = 8m^9n^10p

answer
C. </span>8m^9n^10p
7 0
3 years ago
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Martina needs to make a total of 40 deliveries this week. so far she has completed 12 of them. what percentage of her total deli
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Answer: 10 percent

Step-by-step explanation:

because she was supposed to do 40 she did only 12 so it is 10%

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3 years ago
Ben is 6 feet tall. He pounds a stake into the ground until only 1 foot of it is remaining out of the ground. It’s shadow is six
Mekhanik [1.2K]

Answer: 3 feet, or 36 inches.

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The measure of an exterior angle of a triangle is zº. The measure of the adjacent interior angle is at least twice 2". Which of
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The best of me and said that you

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